(19)
(11) EP 0 293 691 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
10.01.1990 Bulletin 1990/02

(43) Date of publication A2:
07.12.1988 Bulletin 1988/49

(21) Application number: 88108111.1

(22) Date of filing: 20.05.1988
(51) International Patent Classification (IPC)4: C08F 6/12, C08J 3/14, C08J 3/20, C08L 57/06
// (C08L57/06, 71:12)
(84) Designated Contracting States:
DE FR GB IT NL

(30) Priority: 01.06.1987 US 56514

(71) Applicant: GENERAL ELECTRIC COMPANY
Schenectady New York 12305 (US)

(72) Inventors:
  • Campbell John Robert
    Clifton Park, NY 12065 (US)
  • Johnson, Philip Colony
    Windsor, MA 01270 (US)

(74) Representative: Pratt, Richard Wilson et al
London Patent Operation G.E. Technical Services Co. Inc. Essex House 12/13 Essex Street
London WC2R 3AA
London WC2R 3AA (GB)


(56) References cited: : 
   
       


    (54) Ionomer compositions and method for their preparation


    (57) Ionomers in the salt form, such as the ammonium salts of sulfonated polystyrene, are precipitated from solution in a non-polar organic liquid by contact with a polar liquid in which the ionomer has only limited solu­bility (e.g., methanol) and a particulate solid such as a polyphenylene ether, followed by contact with a salt such as ammonium chloride, preferably in solution in the polar liquid. The resulting ionomer-coated polyphenylene ether particles are easily filtered and handled.





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